From personal experience, including reading a lot of HN, I think programmers as a species are especially biased towards putting forth opinions in the hopes of being validated for our experience or intelligence, even when we know we don't know much about the subject. The fact that IANAL (I Am Not A Lawyer) [but...] is a common enough statement in these circles to deserve its own acronym is telling. We often throw out unchecked opinions in hopes they may be right, because that would feel really good, and just let others tell us if they're wrong. When those opinions take the form of a blog post, rebuttal often doesn't exist in the same place as the content, making it seem more authoritative than it often deserves to be.